Isospiridae is an extinct family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of fossil

Fossil

Fossils are the preserved remains or traces of animals , plants, and other organisms from the remote past...

 sea snail

Snail

Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...

s, Paleozoic

Paleozoic

The Paleozoic era is the earliest of three geologic eras of the Phanerozoic eon, spanning from roughly...

 gastropod mollusks.

This family is unassigned to superfamily. This family has no subfamilies according to the taxonomy by Bouchet & Rocroi (2005)

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

. It is classified as "Basal taxa that are certainly Gastropoda" by Bouchet & Rocroi (2005).

Genera

• Isospira Koken, 1897 - type genus of the family Isospiridae. Species include:
  • Isospira bucanioides Koken, 1897
  • Isospira huttoni Cowper Reed, 1921
  • Isospira lepida Perner, 1903
  • Isospira nautilina Koken & Perner, 1925
  • Isospira reinwaldti Öpik, 1930
  • Isospira reticulatus Wängberg-Eriksson, 1964 - synonym: Isospira reticulata

Taxonomy

Peter J. Wagner

Peter J. Wagner

Peter J. Wagner is a paleontologist and curator at the Smithsonian Institution. He received his Ph.D. in Geophysical Sciences from The University of Chicago in 1995, conducted postdoctoral research at the Smithsonian Institution, and served as a curator at the Field Museum of Natural History from...

 consider Isospiridae as synonym of Cyrtonellidae within Tergomya, The Paleobiology Database has become adatapted to this unpublished opinion by Wagner. This alternate taxonomy is as: Tergomya, Cyrtonellida

Cyrtonellida

Cyrtonellida is a group of "monoplacophora", representing either a sister taxon to, or a polyphyletic assemblage including, the Trybliida....

, Cyrtonellidae.